Locking device for stereotype-matrices.



A. EGLI.

LOCKING DEVICE FOR STEREOTYPE MATRICES.

APPLICATION FILED FEB. 9, 1911.

1,090,842. Patented Mar. 24, 1914 4 SHEETSSHEET l.

X 1 EX .2.

f I M am Exam W't I ygplesses M6345 'UOLUMUIA PLANOGRAPH c0., WASHINGTON. n.

A. EGLI.

LOCKING DEVICE FOR STEREOTYPE MATRICES. APPLICATION FILED FEB. 9, 1911.

1 090 84g Patented Mar. 24, 191 i igafLi i if Witnesses: v Arnokd 635' MJK i1 COLUMBIA PLANOGRAI'H c0.. \\\SI|INGTON. n, c.

A.- EGLI.

LOCKING DEVICE FOR STEREOTYPE MATRICES APPLICATION FILED FEB. 9, 1911.

1,090,842, Patented Mar. 24, 19M

4 SHEETS-SHEET 3.

A. EGLI.

LOCKING DEVICE FOR STEREOTYPE MATRICES.

APPLICATION FILED FEB. 9, 1911.

1 ,O90,842. I Patented Mar. 24, 191 1 4 SHEETS-SHEET 4.

UNITED STAE$ TE ARNOLD EGLI, OF PLAUEN, GERMANY, ASSIGNOR TO VOGTLANDISGHE MASCHINEN- FABRIK (VORMALS J. 0. 85 H. DIETRICH) ACTIENGESELLSCHAFT, OF PLAUEN, GER- MANY.

LOCKING DEVICE FOR- STEREOTYPE-MATRICES.

To all whom it may concern:

Be it known that I, ARNOLD EGLI, a subect of the King of Prussia, residing at Plauen i. V.,in the Kingdom of Saxony, German Empire, have invented certain new and useful Improvements in Looking Devices for StereotypeMatrices, of which the following is a specification.

This invention relates to locking 01' clamping devices for matrices such as are employed for casting molds for producing stereotype plates,

In accordance with my invention the matrix is placed in the locking device and the latter is then arranged with the matrix in the casting apparatus; while heretofore the matrices have been placed in the casting apparatus and there clamped by means of clamping bars fixed to said apparatus.

An embodiment of my improved locking device is illustrated, by way of example in the accompanying drawing in which:

Figure 1 shows in front elevation the device serving for locking one side of the matrix opened and with the locking bar removed. Fig. 2 shows the locking device closed. Fig. 3 shows the closed locking de vice viewed from the rear. Fig. t shows the locking device closed in side elevation. Fig. 5 is a front elevation of a clamped matrix ready for insertion in the casting mold. Fig. 6 is a section on the line AA in Fig. 5. Fig. 7 is a perspective view of one end of the bar cooperating with the locking bar and the locking means; Fig. 8 is a section through the center of the projection Z taken at right angles to the section shown in Fig. 6, showing also the relation of the matrix and its clamps with the mold. Figs. 9 and 10 are a front elevation and sectional view respectively, showing the manner of attaching the clamping device to the mold.

As particularly shown in Figs. 5 and 6, the locking device consists of two similar sets of bars between which two of the edges of the matrix are clamped outside the casting apparatus and independently thereof.

Each set of bars itself forms a clamp which consists, on the one hand, of a bar a provided with pintles b by means of which it is assembled with the casting mold, and, on the other hand, of the locking bar 0 connected with the bar a by locking bolts or like Specification of Letters Patent.

Application filed February 9, 1911.

Patented Mar. 24L, 191%.

Serial No. 607,606.

members d slidably mounted in guides 6 arranged in or upon the bar a. These guides e for the locking bolts cl may be made of dovetail, or any other suitable shape. The looking bolts (Z, a suitable number of which are arranged at intervals, comprise a hookshaped head-piece h which clamps the lockmg bars a and c and the interposed matrix 2' (Figs. 5 and 6). As illustrated by way of example in the drawing, the sliding of the locking bolts cl in the guides c in the bars a can be produced by suitable means such as cams f arranged in the guide portion of the bar a; and extending into recesses g in the bolts 03. By acting upon the cams f, the locking bolts (Z are caused to slide in the guides e and, as the head-piece it bears against the locking bar 0 the latter is clamped and with it the matrix, or when the head piece it releases the bar 0 the latter permits of changing the matrix. Now, in order to permit the adjusting of the locking bars 0 for different lengths of composition they are recessed at is, such recesses sliding over the shank of the bolts d or being guided thereon. By means of these recesses the locking bars can be shifted as desired laterally of the surface of the matrix and readily adj 11st ed to any length of composition so that it is possible to produce stereotype plates for various lengths of composition ready for printing in one operation. It will be obvious that the adjustability of the locking bars 0 and the possibility of exactly adjusting them to any length of composition for the plates to be produced prevents the formation of ridges or other projections on the plates to be cast. In order to obtain a clean and good impression it has heretofore been necessary to remove such protuberances from the cast stereotype plates by a special operation. The cams 7" for operating the bolts (Z are turned by means of a key (not shown), fitted to the squared projecting end Z.

As shown in Figs. 9 and 10, the pintles I) referred to each engage a recessed chamber 6 in the frame or mold.

I claim A clamping device for stereotype matrices forming part of a casting mold, comprising two sets of bars, each set forming a separate clamp for one edge of the matrix, locking bolts on one bar of each set for clamping the bars together, cams for operating the In testimony whereof I have afl ixed my said locking bolts, the other bar having resignature in presence of twowitnesses.

cesses for said lockin bolts ermittin adjustment of the bars %e1ative to each o ther, ARNOLD EGLI' 5 and pintles on one bar permitting the clamp- Witnesses:

ing device to be removably attached to the ERNST WAGNER,

casting mold. ROBERT HEINRICH NIER.

Copiea of thin patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

